Base64 Encoder/Decoder - Encode Decode Text
Convert text to Base64 and decode Base64 strings instantly with our free online encoder/decoder tool.
About Base64 Encoding
Base64 is a binary-to-text encoding scheme that represents binary data using a set of 64 printable ASCII characters. This encoding method is widely used in computing for transmitting data over media that are designed to handle text, such as email, HTML, and JSON. The Base64 encoding process takes every three bytes of input data and converts them into four encoded characters, using a lookup table of the 64-character alphabet consisting of uppercase letters, lowercase letters, digits, and two special symbols.
The primary purpose of Base64 encoding is to ensure that binary data can be safely transmitted across systems that may not support raw binary format. For example, email systems originally only supported ASCII text, so Base64 encoding was essential for attaching binary files like images and documents. Today, Base64 remains fundamental in web development for embedding images directly in HTML or CSS, encoding API credentials in HTTP headers, and serializing data in JSON format.
Our Base64 encoder/decoder tool processes your data entirely in your browser, ensuring that your sensitive information never leaves your device. Whether you need to encode credentials for API calls, decode encoded email attachments, or work with data URIs, our tool provides instant and accurate results with support for both ASCII and Unicode text input.
How to Use the Base64 Encoder/Decoder
Using our Base64 tool is simple and straightforward. To encode text to Base64, type or paste your text into the input field and click the Encode button. The Base64 encoded output will appear instantly in the result area below. To decode a Base64 string, paste the encoded text into the same input field and click the Decode button to retrieve the original text.
You can use the Copy button to quickly copy the result to your clipboard for use in other applications. The Clear button allows you to reset both fields and start fresh. Our tool handles both ASCII and Unicode text, so you can encode special characters, emojis, and non-English languages with confidence.
The encoding process happens entirely in your browser using JavaScript, which means your data is never sent to any server. This makes our tool ideal for encoding sensitive information like API keys, passwords, or personal data that you do not want transmitted over the internet.
Frequently Asked Questions
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